Okay, well I am starting to get ideas now. I am not a big guy. I weigh usually around 68-70kg. I do race, and I am somewhat powerful, I'd like to think.
Now with my situation the bearing alignment itself I don't think is the issue at all. I am not really using BB30 like most of you. I have a standard threaded BB shell, and the Vuma Quad cups thread into it, that use the BB30 bearings. As Phil P mentioned the bearings are actually spaced out wider than BB30. These are the cups I've been using.
They fit in there tight. I remove the cups from the frame, and I use a regular 3/4 ton press to press the bearing in, and they usually pop out pretty easy with a hammer, and the appropriate sized socket.
I don't see how the bearing alignment could be off. Now the spindle on the other hand. Fits pretty loose until you tighten the system up. It seems like the lip at the ends of the crank arms on the spindle is what centers it up. So there may be a possibility of some misalignment in there between the inner race, and the spindle. Maybe a bit of loctite in there would help things? I am thinking this may be the culprit.